Professor's Research

25%of 20 graded came back a PSA 10. A small sample, so one grade moves it.

How they graded

Every grade

Copies at each grade, how many sit at that grade or higher, and PSA’s price where it lists one.

GradeCopiesPSA price

PSA 105—

PSA 91217 at 9+—

PSA 8118 at 8+—

PSA 7119 at 7+—

PSA 6019 at 6+—

PSA 5019 at 5+—

PSA 4019 at 4+—

PSA 3019 at 3+—

PSA 2019 at 2+—

PSA 1019 at 1+—

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